Mine-door opener.



No. 652,540` l Patented vJune 26, |900. W. A. GOLD, F. P. EKEllT,I A.'PFEIFF ER &, A. H`.VLEW|S..

MINE DUUR UPENER.

(Application filed hn. 28, 1899.\ (No Model.)

2 sheets-slim( l.

No. 652,540. Patenfed .lune 26, |900.

W. A. GULD, F. P. ECKERT, A. PFEIFFER'. A. H. LEWIS.

MINE Doon'nPEnE.

(Application tiled Jan. 28,1899.)

o n o Q' (No Model.; 2 Sheets-Sheet 2.

NITED STATES `PATENT EEICE.

WILLIAM A. GOLD, FREDERICK P. EOKERT, ADAM PEEIEEER, AND ALBERT I-I. LEwIs, OE PORT WASHINGTON, OI-IIO.

`lVllNE-IJOOR OPENER.

SPECIFICATION rousing part 'of Letters Patent No. 652,540, dated June' 26, 1900. Application ined January 2s, 139e, sel-n1 No. 703,760. (No anni.)

To @ZZ whom t may concern.:

Be it known that we, WILLIAM A. GOLD, FREDERICK P. EOKERT, ADAM PEEIEEER, and ALBERT H. LEWIS, citizens of the United States, residing at PortWashington, in the county of Tuscarawas and State of Ohio, have invented certain new and useful Improve- :ments in Automatic Mine-Door Openers, of which the following is a speciication, reference being had therein to the accompanying drawings.A

Our invention relates to doors for mines, and is substantiallya device for automatically opening the said' door upon the approach of the mine-car and closing the sameafter the said car has passed. Moreover, the apparatus is so designed as to operate for a 'car moving in either direction upon the minetrack in common use.

Ve will first describe our invention in detail with the aid of the accompanying drawings, in Which-"- Figure l is a plan view of a mine-door with our apparatus for opening and closing the same. Fig. 2 is a view as seen from the line fr of Fig. 1. Fig. 3 is a detail of the cablehook. Fig. et is a view of a portion ofthe opening apparatus. Fig. 5 i s a front view of the doors, with'a portion of the opening apparatus. Figs. 6 and 7 are successive views of parts of the opening apparatus; and Fig.

8 is a plan View of the doors, showing the de vice for movingthedoors inunison.

In the several views the same numeral always indicates the same part.

1 represents the railroad of a mine, passing through the double doors 2 in a manner well known to miners, land we have shown the doors as placed upon a curve, although they wouldmore often be upon straight road. The apparatus for opening and closing the doors will operate as well, however, when the doors are placed upon a curve as when yupon a straight section. l

Near the upper edge of the doors are se'- cured brackets 3, to which are pivoted the ends of arms A, extending rearward and pivoted to each other at 5. By this means the doors are made to yopen and close together.

To close the doors, a coil-spring 6 is provided, lone end of which issecured to one of the doors and the other end to the framework.

The mechanism for Opening the doors will now be described.

A short chain or flexible connection 7 is secured to the outer face of one of the doors a short distance away from the pivotal line of its hinging, the other end of said connection being secured to the extremity of a bellcrank S, pivoted to the door-frame by means of a bracket 9. The other end of the bellcrank 8 Ais bent to a plane at right angles with the main portion thereof, and a hole 9:L is provided therein, in which isv seated an eyebolt 10, secured in place by the nut 11, by means of which the eyebolt may be adj usted. Secured to the eye of the said eyebolt is a flexible connection 12, the other end of which is secured in the groove of a pulley 13 above its hori zontal center, said pulley being mounted fast upon a rocking shaft 14, journaled in bearings 15. Adjacent to the pulley 13 and likewise fast-mounted upon the rocking shaft 14 is a second pulley 16, with a flexible connection 17 secured to the top thereof and passing under the said pulley to and around a horizontal pulley 18 and thence to the hook 19 of a coupling 20, pivoted to the end of the lever 21, pivoted at its mid-portion to a pedestal 22 and at its extremity to a flanged push-rail 23. This rail 23 is supported by levers 21 slightly over and parallel to the road-rail and extends some little distance in either direction from the doors. The ends of the push-rail are curved outwardly, as at 24, to receive the first impact of the car-wheels and cause them to push the said rail forward and outward without jar. At the other end of the push-rail 23 is a second lever 21, pivoted thereto and to a pedestal 22. At the end of the lever 21 is a second pivoted coupling and hook, from which last a flexible connection 25 passes about a pulley 26 and over a pulley 27, to the bottom of which it is secured. The pulley 27 is fastmounted upon the rocking shaft 14, adjacent to the pulley 16.

Having now described the several mechanical elements `of our invention, We will showr its method of operation.

A car approaching either end of the pushrail 23 will press against its curved end, pushing the rail both forward and outward. The

lever 2l is oscillated, pulling upon the nearest llexible connection, which will rotatethe rockz ing-shaft pulley, to which it is attached. The rocking of the said shaft will partly rotate the i pulley 13, oscillate the` bellcrank '8, and open* the doors. When the car passes the other end of the push-rail, it returns to its original position and the doors are closed by the spring 6. Our invention being now fully described i, and its method of operation shown, what We; wish tosecure by Letters Patent-and clai-m is l. In .an automatic door-opener, the com-i bina'tion of the doors, means for clos-ing them, E a pivoted bell-crank, flexibly connected at l, one end lto a door, a rock-shaft, a pulley fastmounted upon said rock-shaft, to the groove of which the other rend of the bell-crank is 1 flexibly connected, two other pulleys fast upon said rock-shaft, flexible connections se- 2 cured to said pulleys, .and to mechanism fori actuating said ilexible connections, rotating;

the pulleys and oscillating the bell-crank, substantially as and for the purpose described. e

2. In an automatic door-opener, the combination of the doors, means for closing them, a pivoted bell-crank, flexibly connected at one end to a door, a rock-shaft, a pulley fastm-ounted upon said rock-shaft, to the groove of which the other end of the bell-crank is flexibly connected, two other pulleys fast upon said rock-shaft, a push-rail, levers pivoted thereto and fulcrumed adjacent to said rail, hooks pivoted to the ends of said levers, horizontal pulleys, and iexible connections from the hooks, passing about the horizontal pulleys, and secured to the rocks-haft pulleys, one above and one, below the same.

Signed by us at Port Washington, fOhio,

W. J. I-IAsK-INsoN, HOWARD L. ANDERSON. 

